Disbarking machine



Sept- 25 1934- K. G. HELLNER DIsARKING MACHINE' Filedllarch l0. 1931 Patented Sept. 25, 1934 y Ummm- Sfm'rf Eis Swedena Amnieatidn.tratenj 10, 1931,4 seriaLNm 521,60

In' SWede'April-Si 1930- v 14 Clatim's."A (Cl. lili-208) i "timategcontaet'with each otheryand-parallel-to the! axisO of the drum-,f thelogs. beingl caused by tunrilolingfV-to` rub against-eachother, if desired in the .presence of water;Y so that vthe bark-fis strippedv l off 10J The feature Yof the; invention isf-based on -the utilizationfof ther-known -fact ithat; when a 'plud ralityl-,of .logs are-in` thisfrmannerv enclosed- Within a rotatingfdisbarkingfdrumfthat the iogswhich m are ,situated on that, side pff :thefaxis of the fdrum' 'wherefthe Wall of --thedrum"moves ulowardlmvwill be piled upjalong'that 1WallofI the drum or by'car-M riers ,seeuredthereto; sof .thatthefthus piled up logs will be-situatedhigher -thanthevlogs `Which.- 20 hare situatedfon the opposite side of-the axis of the drum where theft/all: ofwthe' f drum; moves down wardly. e v Y Thesezfcircumstances-:are utilized, according' E to the invention, inter alia tailoring-:about automatic emptying Eof".fthezdrum,r thatcis: to'say forremo'val l'of entirely or partly-stripped logs-'from'the 'drur'nl` Without the-:latter- :having-:5to fbefprovided `with a coverand =,withoutfit beingnecessary :tov stop fthe same.- 1 Y The .arrangement aimedfatvby the in'ventiorifu is principally characterized-bythe!- feature 'that' the. disbarking- E drum. hasvone or? 'more i openings extending@A preferably-falling# the` wh'olef of,i its f length, f and' fby the provision outsidefthe drum of one or more fmembersfinsuoha manner that, Uvvvhenthe opening .of theidrumforany' of the openings; thereof; have,-.I duringf` the f rotation offtheA drurn',loeen` .brought Aright opposite the uppermost-`V log1 oralogs,` which, whileenclosed inflthef druin, 7 l1a\re :loeen` brought 'upwardly by=1the latter,` the said loglorx-logs mayafall. outsthrough the openinglf' Without ibeing prevented` by zthe member or mem-f bers; :partly: enelosingo1thefdrum' "whereasfi fsa'id i rnemberfor :members-Willi otherwise'k prevent th'e ,y logs-ifrom'fallingout; i

' The r arrangement' 2may, be carriedoutr byime'ans f of various embodimentseither foriperiodicdis-`4` barking; that `to say l.ini such .mannerrthat fthe f disloarking drums-iis 'E dirst filled ancl thenI-fdriven ff' E round until disbarking of all logs has .beenf2-f1n' ished'; orgrftherdisbarking ioperation may:1:take`" place ,fcontinuouslyfin such: manner thatthe 4-logs41V arefsuceessivel-y fed-in during operatiomfandarei fr also delivered durmg'operation '-inf a disbarkedor f partly disbarked:state.'r:` Y Y '40":logs then falling out each time an opening 8 is ary with one of the openings 8 in the approximate position relatively to the conveyor 9 shown in Fig. 2. The logs may then, according as they are delivered by the conveyor fall from the latter down into the drum through the opening 8. The upper pivoted extensions of the bars 11 are kept in the upright position. When the drum has been lled with the proper number of logs it is rotated in the direction of the arrow 22. The enclosed lot of logs then takes the position represented in Fig. 3. During the rotation none of the logs can fall out of the drum, whether the drum openings 8 be directed downwardly or obliquely upwards. The falling out of the same in the downward direction is prevented by the bars 11 as hereinbefore described, and, when one of the openings is directed obliquely upwards to the right, the logs are prevented from falling out by the upright extensions of the bars 11, whereas, when any of the openings 8 is directed obliquely upwards to the left, the falling out of the logs is obviously out of the question, inasmuch as the lot of logs is then entirely removed from the opening (see Fig. 3).

Emptying of the drum upon completed disbarking is simply eiected by the pivoted extensions of the bars 11 being turned down to the right (Fig. 2) while the drum continues to rotate. When any of the drum openings 8 is then brought above the xed bars, that is to say above the pivots 21 of the bar extensions, the logs carried upwardly by the drum are caused to fall out through the opening. In this manner emptying takes place each time an opening 8 is brought above said pivot 21.

The bars 11 may also be made rigid along the Whole of their length, that is to say, their upper extensions need not be pivoted. In this case the drum is emptied by being rotated in the direction opposite to that during the disbarking operation,

brought above the upper ends of the bars shown to the left in Fig. 2.

The arrangement shown in Fig. 3 for conltinuous disbarking operates substantially in the manner above described. The disbarking drums arranged in series are then provided, each per se, with one or more openings 13 and 14 respectively, Secured to the dr-um tubs are bars 18 and 23 respectively, these bars extending for the major portion of their length along the lower part of the drums in question. The drums are surrounded by bars 17A and 20 rigidly connected therewith, said bars being interrupted at the points corresponding to the drum openings 13 and 14. The logs are delivered by the conveyor 15 which is connected to the rigid bars 18 through the inclined board 16. From the highermost point of the bars 18, to the right according to the drawing, the inclined board 19 extends down to the highermost left point of the rigid bars 23. From the highermost point of the bars 23 on the right hand side, the inclined board 24 extends down to the conveyor 25.

The arrangement last described operates in the following manner.

The logs carried by the conveyor 15 are delivered onto the board 16 and are guided downwardly by the latter so as to bear against the bars 17 of the iirst drum. When the bar interruption and the drum opening corresponding thereto have been brought level with the board 16, the logs fall into the drum. When the opening 13 gets above the highermost point of the bars 18 on the right hand side, the logs carried along upwardly yto the highest point fall out onto the board 19, are guided by the latter downwardly to bear against the bars 20 of the next drum, after which they will fall into the drum when the interruption of said bars and the drum opening corresponding thereto have been brought down to the upper edge of the board 19, and when the opening 14 has been brought above the board 24, the said logs fall out onto the latter which guides the logs down onto the conveyor 25. In this manner, more than two disbarking drums may evidently be arranged in series. The opening or openings 13 of the drum situated first in the series are arranged in their position of; rotation relatively to the opening or openings 14 of the following drum, in such a manner that the opening 13 passes the unloading ends of the bars 18, immediately before the opening 14 is brought level with the slide board 19. Byf this means, logs that have fallen out onto the slide board 19 will remain lying on the board 19 for as short a period of time as possible, thus causing the least possible sliding resistance, against the bars 20.

The bars 17 and 20 rigidly connected with. the drums may be dispensed with, if desired, and instead the logs guided downwardly by the boards 16 and 19 will bear directly against the walls of the drums, if this is permitted by the construction and the resistance of the drum walls.

In the embodiment according to Fig. 4, the bars 11, and 18 and. 23 respectively, which according to the description hereinbefore are rigidly connected with the drum tub or the drum tubs respectively, are replaced by chains 26 running over rollers 27. When the logs then project through the drum opening 27 during the rotation of the drum while the drum opening is directed downwardly, the chains 26 are carried,

along, that is to say, the logs do not slide against the parts surrounding the drum. In this manner the frictional resistance produced when the surrounding parts consist of rigid bars according to Figs. 1-3, is neutralized.

If for some reason or other the drum would suddenly stop during the disbarking operation when the drum opening occupies the position shown on the left in Fig. 3, the logs then having the most elevated position in the drum could fall out through the opening. To prevent this, a shutter 28 is provided outside the drum as an extension of the xed surrounding of the drum, as shown in Fig. 5, said shutter being carried by arms 29 swingably mounted about a fixed point 30. As will be seen from Fig. 5, this shutter will prevent the logs from falling out through the drum opening 13. The arrangement of the shutter also involves the advantage that the point 31 of the fixed surrounding of the drum over which the logs may fall out of the drum when the latter is rotated in a reversed direction, in the manner stated hereinbefore, may be located considerably farther down than when there is no shutter 28. When the drum arranged according to Fig. 5 is to be emptied, the shutter 28 is swung 1 What I claim is:--

1. A disbarking machine for parallel stripping on the tumbling principle, comprising a rotating disbarking drum provided with at least one side opening extending approximately along the whole of its length, and at least one retaining part arranged independently of and in close relation to the outside of the drum to prevent the logs enclosed within the drum from falling out through the opening when the latter move along said part during the rotation of the drum.

2. A disbarking machine according to claim 1, wherein the retaining part includes an independent adjustable section movable into a position which permits the logs to fall out of the drum while the latter is rotating.

3. A disbarking machine for parallel stripping on the tumbling principle comprising a trough, a disbarking drum rotatably mounted in the trough and provided with at least one opening extending approximately throughout the length of the drum, retaining means arranged transversely of the trough and in close relation to the outer surface of the lowermost portion of the drum to prevent the logs from falling through the opening in the drum during rotation thereof.

4. A disbarking machine according to claim 1, wherein the retaining part consists of a bar concentric with the drum and arranged adjacent the lower side of the drum along a portion of its length.

5. A disbarking machine according to claim 3, wherein the retaining means includes a bar partly enclosing the drum secured in the trough in which the drum rotates.

6. A disbarking machine according to claim 3, wherein the retaining means is in the form of a bar arranged adjacent the lower portion of the drum and extended upwardly above the axis of rotation of the drum, on that side of said axis where the wall of the drum moves upwardly during the disbarking process.

7. A disbarking machine according to claim 1, wherein the retaining part includes an adjustable extension pivotally supported on that side, where the wall of the drum moves upwardly during the disbarking process, the said extension being adapted to be turned outwardly at a point approximately level with the axis of the drum.

8. A disbarking machine according to claim 3, wherein the retaining means include a plurality of spaced bars and wherein carriers are provided on the outside of the drum and entering axial spaces provided between the bars in order to carry the logs projecting from the drum opening against the bars, and also to remove bark accumulating in said spaces.

9. A disbarking machine according to claim 1, wherein rigid extensions are provided on the retaining part on that side where the wall of the drum moves upwardly during the disbarking process, the end of the part opposite to the rigid extension being situated on so low a level relatively to the axis of the drum that the latter may be emptied over the last-mentioned part by a reversal of the direction of rotation.

10. A disbarking machine according to claim 3, wherein a supporting shaft is provided for the drum and extends lengthwise through the drum, and a pipe surrounding the shaft and serving to protect the shaft against shocks from the logs enclosed within the drum.

11. A disbarking machine according to claim 1, wherein the retaining part consists of rollers, and chains running over the rollers and guided along the lowermost portion of the drum.

12. A disbarking machine according to claim 1, wherein a xed part is provided partly enclosing the drum on that side where the drum moves counter-clockwise during the disbarking process and wherein a shutter is provided and is swingably mounted substantially concentrically 100 of the drum, said shutter forming a continuation of the xed part and the peripheral extension of the shutter being such that the same will cover the drum opening when moving counter-clockwise.

13. A disbarking machine for parallel stripping on the tumbling principle, comprising a receptacle, a disbarking drum rotatable therein and provided with at least one opening extending approximately throughout its length, re- 11() taining bars xed transversely of the receptacle and arranged to engage the lower portion of the drum so as to prevent the logs enclosed within the drum from falling out through the opening when the latter move along said part "dur- 115 ing the rotation of the drum, a slide board connected with the retaining bars on one side of the drum, means for delivering logs to said slide board, another slide board on the opposite side of the drum, and other bars rigid with the drum 120 with interruptions corresponding to the drum opening, said last named bars cooperating with the first slide board so that the logs when moving down said slide board will rest against the bars on the drums until the interruptions are 125 brought level with they slide board.

14. A disbarking machine in accordance with claim 13, wherein a plurality of drums are provided between a plurality of the slide boards. 

